Shock absorber



Nov, 3, 1925. 1,560,477

J. w. KEssLER i sHocx ABSORBER r Filed June 23. 1923 gnoenloz atto: nu#

- To all 'whom z't may cmwem Patented Nov. A3', 192,5.

, 1,560,411 UNITED `s'raras PATENT orrlcs.

JOHN w. x'sssLna, or rminfiamma,r rnNnsYLvANIA.

snocx Ansonnnn.

i" Application med :une as, 192s. sci-iai up. 641,255.

Beit known that I, JOHN 1V. Ipnssnnn, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Shock Absorbers', ofwwhich the following is a specification.

l tion of luy-'improved shock absorber applied In carrying out the present invention,

is my p urpose to provide al shock absorber primarily but not'specitically adapted for attachment to the Chevrolet type of automobile, wherein the rebound of the vehicle springs willbe retarded for thereby eliminating the usual bumping incident: to the travel of the vehicle. Y l

A further purpose of the, invention is to provide a shock absorber that is adapted for attachment between the car frame and axle in a simple and expeditious manner, the present shock absorber being additionally characterized by the `fact that the same may be manufactured and marketed at small cost, and one that will operate eticotively under all conditions.

The nature and advantages of the invention will be better understood when the following detailed description is read in con- 'nection with the accompanying drawing,

the invention residing in the construction, combination, and arrangement of parts as claimed.

In the drawing forming part .of this application, cate similar parts in the several views, vand wherein i Figure l-is a detail vertical cross secto an automobile, and

Figure 2is a transverse cross section upon the line 2-2 of said figure, and looking upwardly 1u the direction of the arrows.

My shock absorber embodies a cylinder v5 of desirable length and diameter, open at its upper end and externally screw threaded at said end. `Removably arranged l upon the closed end of the cylinder is 'a closurecap 6 formedv with a central opemn surrounding which is a screw threaded nec At one side of the cylinder 5, there is formed a tube 8 that communicates at its oppositeends with the upper and lower ends of the cylinder fpr effecting a by-pass for oil, ease or similar substance placed within the cylinder through an opening 1n v moved towards and lawa like numerals of referenee-indi-- larranged a screw threaded plug 10, this plug being formed with n. screw threaded bore for the reception of a screw threaded, stem 11 of a valve element 12, and is adapted to be from a seat13, formed in sadtube for a justing the return flow of the Vluidwithin the c lindern onl an upward movement of the piston 14, t at is freely movable within the cylinder between the upper and lower ends of said by-pass.

The saidpiston 14 is secured upon the lower end of a rod 15, that is movable.,

through the said openin in the'end mp6. This piston 14 is forme with a plura ity of vertical passages 16 that are normally closed by a disk 17 that surrounds the rod 15, and maintained in closed relation with the piston through the medium of an expansible spring 18.

The up er end of the rod -is-screw threaded or interengagement withl a. fitting 19 that is adapted to be pivotally. secured at 20 to the vehicle frame, designated A in Figure 1'.

' Formed upon said cylinder y5 are ap'air of spaced laterally ldirected and screw threaded rods 21 that' are ada ted for engagement over the vehicle axle by secured thereto by a cross head 22 and binding nuts 23.

In view of the above description, it will at once be apparent when the device is atand theretached to a motor vehicle between the points above mentioned, a downward movementof the car frame A with respect to the axle B will occasion asimilar ymovement of the piston 14 within its cylinder. The oil or grease within the cylinder ,will nd its way past` the piston through the openings 16, itbe ing of' courseapparent that the valve disk 17 will vvbe raised by the compressing of the.

material within said cylinder.

A quick upward movement of the piston` withinl the c linder will be revented in view of the act that the tlui will necessarily have to pass to the lower' portion of the cylinder through the by-pass or tube 8,

this return of thel fluid being adjustable/by the valve 12. Y.

Numerous advantages of a. shock absorber of this type will be readily apparent to those skilled 1n the art, and even though I have herein set forth the most practical embodiment of the present invention with which I am at resent familiar, it is nevertheless to be understood that minor changes may be made therein, without departing from lthe spirit and scope of the inventionas hereinafter claimed;

Having thus described my invention, what I claim as new and desire to secure by Let ters-Patent, isz,

A shock absorber comprising a cylinder provided at itsl side. with a tube portion which communicates ,with the upper and lower portions of the cylinder, said tube portions having a valve seat. a rod slidably mounted in the cylinder, a piston carried by the rod and housed in the cylinder be tween the ends of the tube portion, said piston having ports passing transversely therethrough, a valve disc mounted upon the stem and disposed over the ports, a spring carried by the stem and bearing against the disc and serving to hold the same in a closed position over the ports, a plug threaded in the tube portion opposite the valve seat thereof, and a valve adjustably mounted in the plug and adapted to be moved to increase or diminish the area of the passageway through the tube portion.

In testimony whereof I afiix my signature.

JOHN W. 'KESSLER 

